A User's Manual for DELSOL3 - prod.sandia.gov - Sandia National ...

V.A-4. Tower-The optical tower height THT is used for all performance cal-
culations. The physical tower height THTB, which is the actual tower height from
the ground to the bottom of the receiver, is related to THT by
THTB = THT + HM/2 - H/2 - W (V.A - 5)
where HM = height of a heliostat
H = height of the receiver
W = height of a transition region from the tower to receiver;
this height is assumed to be the same as the receiver diameter W.
The cost of this transition region is assumed to be part of
the cost of the receiver.
The cost of the actual tower is calculated as
It is assumed that towers shorter than 120 m in height are steel towers, while
towers of 120 m or more are concrete toGers, where the difference is shown only
in the cost coefficients for the above equations. The user has two options for cal-
culating the cost of the tower:
a) ITHT = 0; cost based on Sandia studies (Reference 36) and repowering
designs (Reference 35) :
CTOW~ = $0.7823236
CTOWP = 0.01130
CTOW~ = $1.0902536
XTOW = 0.00879
b) ITHT = 1; cost based on user supplied values of CTOWl and CTOP
Namelist NLCOST, where these values are used for all THTB values.
The tower cost for option a) is plotted in Figure V-1. The default choice of tower
cost is ITHT = 0.
V.A-5. Receiver-The equation in DELSOL for costing receivers is of a form
commonly used in the chemical process industries (References 37 and 38). This
equation form, in which cost scales with receiver area, results from the fact that
the receiver is a specially designed heat exchanger. The equation is
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